All newbies should read this and have the knowledge on what to do before and after a hard fork.

https://bitcoinmagazine.com/articles/bitcoin-beginners-guide-surviving-bgold-and-segwit2x-forks/

The BTG hard fork is nothing to worry about. It is called a "friendly" hard fork because it is not trying to be "Bitcoin". Segwit2x is the one to worry about because it claims to be an "upgrade" to Bitcoin.

The guide will tell you what to do, which wallets are safe to use and when you can claim your coins in the forked chain. Read it!